Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 29: Cosmic rays I

T 29.6: Talk

Tuesday, March 31, 2020, 18:15–18:30, H-HS XII

Large Acceptance Analysis of Time-Dependent Electron Fluxes with AMS-02 — •Fabian Machate — 1. Physikalisches Institut B, RWTH Aachen

The Alpha Magnetic Spectrometer (AMS-02) on the International Space Station performs precision measurements of cosmic rays in the GeV to TeV energy range. The published analyses of the electron and positron fluxes rely on the electromagnetic calorimeter (ECAL) for energy measurements and background rejection. The geometrical acceptance for the conventional analyses is restricted by the weight limitations for the calorimeter.

A new analysis method based on the Transition Radiation Detector (TRD) and Tracker will be presented. This analysis has a significantly larger geometrical acceptance and can increase the statistics by a factor of up to  ∼ 4 at the cost of larger systematic uncertainties. These improvements are of particular importance for the time-dependent electron fluxes, which are dominated by statistical uncertainties.